I originally had a 2 1/2 inch Teraflex lift with 33's with 3.73 gears and really didn't notice that much loss in power. If you really need to regear, forget about the 4.10s. They are hard to find and when you do, they will cost you an arm and leg. Go to a 4.56. And while you are regearing, throw in some lockers so you don't have to pay again for tearing them down.